Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Piezoelectric pump with novel semi-active valve

A semi-active, piezoelectric pump technology, used in pumps with flexible working elements, components of pumping devices for elastic fluids, pumps, etc. Output flow, ensure continuity, and increase the effect of response frequency

Active Publication Date: 2015-04-29
ZHEJIANG UNIV
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The passive valve completely relies on the pressure of the hydraulic oil to control the opening and closing of the valve. It has a simple structure and is easy to manufacture, but the passive valve has great defects in the response frequency and the prevention of hydraulic oil backflow.
The active valve is made of piezoelectric material, and a specific voltage is given to it by the controller to realize the opening and closing of the valve. It improves the response frequency of the valve to a certain extent, but its limitation is that the production of this one-way valve is complicated. Requires very high precision controller control

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Piezoelectric pump with novel semi-active valve
  • Piezoelectric pump with novel semi-active valve
  • Piezoelectric pump with novel semi-active valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] like figure 1 Shown: A piezoelectric pump with a new type of semi-active valve is mainly composed of pump body 1, spring 2, rigid element 3, elastic diaphragm 4, oil inlet check valve 5, auxiliary oil circuit 6, oil outlet single Composed of valve 7, oil outlet oil circuit 8, oil inlet oil circuit 9, circuit 10, power amplifier 11, signal controller 12, piezoelectric stack drivers A, B and chambers A, B.

[0021] The pump body 1 of the piezoelectric digital pump is made of stainless steel. Piezoelectric stack drivers A and B are placed inside. Piezoelectric stack drivers A and B are composed of multilayer piezoelectric ceramic sheets, electrodes, and insulators, which are formed as a whole by special process pressing and packaged in a metal shell. The whole actuator is fixedly connected with the pump body 1 . The stack driver is controlled by...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a piezoelectric pump with a novel semi-active valve. An auxiliary oil circuit is added into the traditional oil circuit to guide the discharged high pressure oil into the auxiliary oil circuit and jack an elastic film so as to achieve the auxiliary opening of an oil inlet one-way valve. According to the piezoelectric pump with the novel semi-active valve, the auxiliary opening of the one-way valve is achieved and the high pressure oil can be isolated from the low pressure oil so as to prevent the high pressure oil from entering a low pressure oil chamber due to the elastic film and the symmetrical double-pump structure design is adopted and accordingly the structure is simplified, the work is consistent, the working frequency is increased, and the flow of the hydraulic oil is increased.

Description

technical field [0001] The invention relates to a piezoelectric pump with a semi-active valve (hereinafter referred to as a piezoelectric pump with a semi-active valve). To be precise, it concerns a high-pressure miniature digital hydraulic pump with a novel semi-active valve driven by a piezoelectric stack actuator. Background technique [0002] Piezoelectric pump is an important branch of micro fluid pump. Its working principle is to convert the mechanical energy generated by high-frequency vibration of piezoelectric actuator into highly controllable hydraulic energy. Compared with pumps with other structures, piezoelectric pumps have a simpler driving structure. The energy conversion part and the fluid drive part are the same original, and there is no transmission mechanism in the middle. At the same time, due to the characteristics of fast response and high precision of piezoelectric materials, piezoelectric pumps have the following characteristics: low power consumptio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F04B43/04F04B53/10
Inventor 王林翔李昕陈惟峰
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com